Automatically controlled portable fuel pumping unit



April 10,1945. D. SAMIRAN 2,373,143

AUTOMATICALLY CONTROLLED PORTABLEFUEL PUMPING UNIT Filed Jul 15, 1945 2Sheets-Sheet 1 He. I

April 10, 1945. Q SAWRAN 2,373,143

' AUTOMATICALLY CONTROLLED PORTABLE FUEL PUMPING UNIT Filed July 13,1943 2 Sheets-Sheet 2 INl/ENTDP 0,4140 SAM/Ev? yw f/ Patented Apr. 10,1945 AUTOMATICALLY CONTROLLED PORTABLE FUEL PUMPING UNIT David Samiran,Osborn, Ohio Application July 13, 1943, Serial No, 494,553

(Granted under the act of March 3, 1883', as amended'April 30, 1928; 370O. G. 757) 14 Claims.

The invention described herein may be manufactured and used by or forthe Government for governmental purposes, without the payment to me ofany royalty thereon.

This invention relates to fuel pumping apparatus, and particularly, to apower operated portable pumping unit for pumping liquid fuel fromcontainers into the tanks or other reservoirs or receptacles ofaircraft, or the like.

An object of the invention is to provide a unit of this kind withautomatic control means, to the end that the user need not be inconstant attendance when the device is pumping.

Another object of the invention is to provide when the tank being pumpedinto has become filled and will then transfer the sensation to thepumping unit, where appropriate controls are actuated, thereby toautomatically cause discontinuance of pump operation.

Since it not infrequently happens that a certain amount of 'wateraccidentally gets into a container and settles to .the bottom, and mustbe avoided when pumping fuel from the container, cooperating means areprovided for sensing the presence of such Water and transferring the sensation to the pump, where proper control means are actuated to reducepump effort until the difficulty may be remedied.

Since a pumping unit of this kind may frequently be required to operatewhere a source of electrical energy is not readily available, arelatively small internal combustion engine has been selected in theinstant embodiment as a power source for operating the pump, the fuelfor operating the engine being taken from the discharge side of thepump, a fuel pressure responsive means being provided for controllingthe engine throttle and for disconnecting the drive between the engineand pump.

In the drawings, which are schematic eleva tional views showing 'anillustrative embodiment of the invention,

Fig. 1 is a view of the improved apparatus as it may appear either whenthe engine is at rest or is rotating, but with the pump unit drivablydisconnected therefrom.

Fig. 2 is a view of the apparatus as it appears when the engine and pumpunits are manually connected, the engine throttle still beingautomatically retained in the idling position.

Fig. 3 shows the mechanism as it appears with the apparatus in action,the throttle automatically held open, and pumping conditions normal.

Fig. 4 shows-the automatic cooperation of the controls when a stratum ofwater is encountered in the fuel receptacle by the pump suction pipe.

Fig. 5 shows the action'of the controls when the tank which is beingpumped into becomes filled to a predetermined-level.

Like reference characters refer to like parts throughout the severalfigures.

Referring now to the drawings, a small internal combustion engine It! isdrivably connected to a pump i2 through a speed reducing gear unit M.The usual grooved pulley II is provided on the engine shaft for startingthe engine. The gear unit It is contained within a housing I6 andcomprises a brake drum 18, which is rotatable freely on the engine shaft20 and has two horizontally extending studs 22 upon each of which aretwo pinions 24 and 26, which are joined together for unitary rotationand are freely rotatable on the studs. A pinion 28 on the pump shaft 20meshes with the pinions, while the pinions 26 mesh with the internalgear 30011 the pump shaft 32.

Obviously, when the drum l 8 is not held against rotation, the rotationof the'engine shaft ZO-and pinion 28 will merely cause the pinions 24and 2G to planitate in .the gear 30, thereby leaving the pump shaftnonrotative. Rotation of the pump shaft may be'had, however, by holdingthe drum I8 against rotation.

Asa means for holding the drum l8 against rotation, a control lever 34is pivoted in the housing it at 36, and a link 38, hinged to the lowerend of the lever at 40, has its own lower end hinged to the brake shoe42 at 43. A detent ball it, actuated by a spring 46, is adapted toengage either the notch 48 when the upper end of the lever 34 is movedto the left for withdrawing the shoe 4?. from the drum it, or the notch50 when the upper end of the lever is moved to the right for applyingthe shoe to the-drum. Movement of the upper end of the lever to theright, therefore, drivably connects the pump I2 to the engine in throughthe gear unit l4 while the movement to the left frees the pump from theengine.

The discharge side 52 of the pump 12 is rovided with a-conduit 54 forconveying fuel from the pump to the tank 56. A discharge nozzle 58 onthe tank end of the conduit is of that type which may be inserted in thetank and opened manually by an opening means, as at 60, but

closes itself automatically by a float or similar closing means, as at62, when the tank becomes filled with the liquid fuel, thus preventingoverflowing of the tank. The valve 51 is of the clapper type hinged at59, and is normally swung out of the path of the incoming fuel by theweight of the float 62 acting through the link 6| but is interposed inthe path of the fuel when the float rises, whereupon the inertia of theflowing fuel closes the valve. It is noted that while closing of thevalve 57 prevents further flow into the tank 56, the valve will notprevent drain-back of the fuel in the conduit 54 through the pump whenthe pump ceases rotation.

Such a discharge nozzle is shownand described in a copendingapplication, Serial No. 480,162, filed March 23, 1943, andis thereforenot separately-claimed herein, butonly in combination withinstrumentalities which react to its closing The interiors of the casing66 and conduit 54 are connected, as at 16.

The'control rod 1.2- has'anelongated slot I8. A pin 80 has its one endfast in the control lever 34 and the other end extending freely intothes1ot.'I8. The outer end of the control rod 12 is hinged by the pin 82 toone free end of a bell crank 84. The middle of the bell crank is hingedby the pin 85 to a bracket 88 which extends upwardly from the intakepipe 90 of the engine I0. The other free end of the bell crank 84 ishinged by apin 92 to a link 94 which is connected to theend of. a. shortarm 96, which operates the throttle 98. A carburetor I is keptsuppliedwith fuel by a smallpipe I02 which connects the carburetor to thedischarge conduit 54.

age hole I33 may extend through the cover, or, if desired, the flapvalve I32 itself may intentionally be made to leak slightly. A valve I34is provided for closing the opening between the casing I22 and suctionpipe I06, the valve being centrally secured to the diaphragm I28 andresilient- 1y held to its closed position by the spring I36. The valveI34 is guided to its seat by a hollow cylindrical portion I38, whichfits the valve passage slidably, there being V shaped notches I40 cutthrough the wall of the cylinder whereby the capacity of the valve topass air increases gradu- The suction side m4 of the pump I2 is providedwith a pipe I06. which fits slidably intoanother pipe I08, whereby thebottom portions of con tainers I09 of different depthsmay be reached. Asuction shutoff valve H0 at the lower end of the suction pipe is soarranged that its floatactuated valve I I2 is normally down and off itsseat H4, whereby the valve is open' and fuel III may enter the openingsH6 and pass upward through the suction pipe I08- The float II8, however,is so balanced that it will sink in the fuel but rise in water, wherebythe valve stays open as long as there is no water, as at H3, in thebottom of the container from which the fuel is being pumped.

Such a suction shutoif valve is shown and described in my copendingapplication, Serial No. 323,560, filed March 12,1940, and is thereforenot separately claimed herein, but only in combinationwith other deviceswhich are aifected by its opening and closing.

In the wall of the suction pipe I06, between the suction shutofi valveH0 and the pump I2, is a vent valve assembly I which comprises a casingI22, vented at I24, and a lid I26 with diaphragm I28 clampedv betweenthe casing and lid. The cover. I26 has a small opening I30 which iscovered bya spring actuated flap valve I32 biased for inflow intothe-space enclosed between the cover and diaphragm. .An additional smallleakally as the valve rises from its seat. The spring I36 is undersufficient initial stress to hold the valve I34 seated against thenormal pumping suction in the pip I06.

.The apparatus shown may preferably be put into service in the followingmanner:

With the control lever 34 in the vertical or neutral position (see Fig.1), whereby the gear unit I4 is inoperative to drivably connect theengine and pump units, the engine may be started in the usual manner bywrapping a cord around the pulley I I and pulling its free end.- Byreference to Fig. 1, it will be seen that, when the pump is notconnected to the engine, the absence of pressure in the control means 64allows the control rod 72 to move to the extreme right end of itstravel, and that, in this position of the control rod, the throttlevalve 98 is held at the closed or idling position, whichautomaticallyprevents the engine from racing when it is running underzero load.

After the suction pipe I08 has been inserted in a container I09 and thedischarge nozzle 58 placed in the filler opening of the tank 56 andopened by the manual means 60, the. control lever 34 may be manuallymoved to the right so as to cause the gear unit I4 to become operativeto drivably connect the engine andapump units together.

Fig. 2 shows the apparatus right after the gear unit has been madeeffective, but before the pump has had time to build any pressure in thecontrol means 64, whereby the throttle valve momentarily remains in theclosed or engine-idling position.

However, .since thepump. speedily builds up a pressure in thecontrolmeans 64. the control rod I2 coincidentally moves to. thev left, againstthe resistance of the spring I4, to the position shown in Fig. 3, inwhich position the throttle is wide open and the apparatus is pumping atfull capacity.

If, while the apparatus is operating at full capacity, as seen in "Fig.3, the suction shutoff valve H0 is lowered sufliciently to encounter astratum of water, as shown at H3 in the bottom of the container I09, thefloat IIB will rise and move the valve II2 against its seat II4,thereby, for the time being, preventing either fuel or water from beingpumped.

When the suction shutoff valve IIO thus closes while the apparatus is.pumping, the vent valve I34 is drawn off its seat by. the suction of.the pump (see Fig. 4), air being thereby'drawn into the suction pipe I06through the vent I24. Since the vent valve I34 is attached to thediaphragm I 28, inward movement ofthe vent valve flexes the diaphragminwardly, which simultaneously draws air in through the flap valve I32into the space between the lid I26 and diaphragm, I28. Almost instantlyafter opening of the valve I34, the air drawn in through the opening I24passes through the pump, whereby the pressure in the control means 64drops, which allows the spring I4 to move the control rod 12 to theright and back to the position which it previously occupied in Fig. 2,where thepump remains connected through the gear unit H, but thethrottle valve 98 is closed, bringing the engine down to idling speed,at which speed it may continue to run while the suction shutoff valveIlfl remains closed by the water and the pump is pumping air in throughthe vent unit I 20. However, since the carburetor I is supplied withfuel through a. small pipe I02 from the discharge pipe 54,

and the discharge pipe now contains air only,

the engine will operate no longer than'it takes to consume the smallamount of fuel in the carburetor even though the attendant neglects toraise the suction shutoff valve assembly H0 out of the water stratum.

Ordinarily, however, the attendant will notice. that the enginehasdropped to idling speed and will raise the suction pipe I08 until thesuction shutoff valve assembly H0 is above the water level, whereuponfuel III will again flow up the suction pipe mil-405 to the pump, andthe spring I36 will seat the vent valve I34. The slow leakage of'a-irthrough the small hole I33 allows the air in the space between the lidI26 and the diaphragm I28 to escape slowly, whereby the vent valve isprevented from seating with too much shock, and is also prevented fromchattering.

When the suction shutoff valve is raised out of the stratum of water,the apparatus reassumes the condition shown in Fig. 3, that is, the fulloperating condition, which will likely not be further disturbed untilthe tank 56 has been pumped full or until the container I09 has beenemptied.

When the tank 56' becomes full to a. predetermined level, the float 62rises and shifts the check valve 51 into the path of the flowing fuel,whereupon the check valve is closed. The

pressure now almost instantly rises in the con-.

trol means 64 above normal and moves the control rod 12 enough fartherto the left (see Fig. from the normal positions of Fig. 3 to cause theright end of the slot 78 to push on the pin 80 and move the controllever 34 back to the vertical position shown in Fig. 1, whereby the pumpis drivably disconnected from the engine. through the gear unit 14.

When rotation of the pump is thus discon' tinned, the almostinstantaneous drop in pressure in the controlmeans 64, permits thecontrol rod 12 to quickly move to the extreme right and close thethrottle valve 98, thereby bringing the engine down to its idling speed,at which speed it may continue to rotate until the small amount of fuelin the carburetor I 00 is consumed, or until the engine is manually shutoff.

while a single exemplification of my apparatus has been herein shown anddescribed, it will. of course, be understood that many modifications maybe made within the spirit of the invention, as for instance, the engineand pump may be connected by a friction clutch which may be operated bythe control lever 34, the power being transmitted from the engine unitto the pump unit through gearing or directly, as may be indicated by therelative rotation of the engine and pump. I

Likewise, while several diaphragms are employed in the automaticcontrols for translating pressure into movement, pistons may besubstituted under certain conditions for the same purpose. i

So also, while the embodiment disclosed includes shutoff means in boththe suction and the discharge conduit, to eitherof which the controlsrespond automatically, it will readily be recognized that a pump of thecharacter shown would have considerable merit if but one of these pipescontained a shutoff means to which the controls were arranged torespond.

Having thus described an embodiment of my invention, in which theobjects hereinbefore set forth are attained, I claim:

1. In a device for pumping fuel from a container into a tank, thecombination of an intern-a1 combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor; a suction shutoff valve at the free end of saidsuction pipe, a float adapted to rise and close said suction shutoffvalve when said float is emrersed in water, a vent valve in said suctionpipe intermediate the suction shutoff valve and the'pump, adapted forinflow of air into said suction pipe when said suction shutoff valve isclosed, a dashpot means for controlling closing of said vent valve, adischarge nozzle on the free end of said discharge conduit, adischargeshutofi valve in said nozzle, 21. float for closing saiddischarge shutoff valve whenthe fuel in said tank reaches apredetermined level, power transmitting means for drivably connecting ordisconnecting the pump to the engine, a control lever actuable to adisconnecting or a connecting position to place said power transmittingmeans in the disconnected or the connected state, detent means forreleasably holding said control lever in one or the other of itspositions, and a pressure responsive control means in pressurecommunication with said discharge conduit for moving said control leverand said throttle, means operative by said control means with subnormalpressure in said discharge conduit to hold said throttle in the engineidling position, with normal pressure in said discharge conduit to holdsaid throttle in the full open position, and with supernormal pressurein said discharge conduit to move said control lever to'thedisconnecting position. 1

- 2. In a device for pumping fuel from'a container into a tank, thecombination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a suction shutoff valve at the free end of saidsuction pipe, a float adapted to rise and close said suction shutoffvalve when said float is emersed in water, a vent valve in said suctionpipe intermediate the suction shutoff valve and the pump, adapted forinflow of air into said suction pipe when said suction shutoff valve isclosed, a dashpot means for controlling closing of said vent valve, adischargenozzle on the free end of said discharge conduit, a dischargeshut off valve in said nozzle, a float'for closing said means includingmeans operative by subnormal pressure insaid discharge conduit, to holdsaid throttle in the engine idling position, operative by normalpressure in said discharge conduit to hold said throttle in the fullopen position, and operative by supernormal pressure in said dischargeconduit to move said control lever to the disconnecting position.

3. In a device for pumping fuel from a container into a, tank, thecombination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a suction shutoff valve at the free end ofsaid-suction pipe, a float adapted to rise and close said suctionshutoff valve when said float is emersed in water, a vent valve in saidsuction pipe intermediate the suction shutoff valve and the pump,adapted for inflow of air into said suction pipe when said suctionshutoff valve is closed, a discharge nozzle on the free end of saiddischarge conduit, a discharge shutoff valve in said nozzle, a float forclosing said discharge shutoff valve when the fuel in said tank reachesa predetermined level, power transmitting means for drivably connectingor disconnecting the pump to the engine, a control lever actuable to adisconnecting or a connectingposition to place said power transmittingmeans in the disconnected or the connected state, resilient means forreleasably holding said control lever in one or the other of itspositions, and a pressure responsive control means associated with saiddischarge conduit, including means operative by subnormal pressure insaid discharge conduit, to hold said throttle in the engine idlingposition, operative by normal pressure in said discharge conduit to holdsaid throttle in the full open position, and operative by supernormalpressure in said discharge conduit to move'said control lever to thedisconnecting position.

4, In a device for pumping fuel from a container into a tank, thecombination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a suction shutoff valve at the free end of saidsuction pipe, a float adapted to rise and close said suction shutoffvalve when said float is emersed in water, a vent valve in saidsuctionpipe intermediate the suction shutoff valve and the pump, adapted forinflow of air into said suction pipe when said suction shutoff valve isclosed, a discharge nozzle on the free end of said discharge conduit, adischarge shutoff valve in said nozzle, a float for closing saiddischarge shutoff valve when the fuel in said tank reaches predeterminedlevel, power transmitting means for drivably connecting or disconnectingthe pump to the engine, a control lever actuable to a disconnecting or aconnecting position to place said power transmitting means in thedisconnected or the connected state, a pressure responsive controlmechanism associated with said discharge conduit operative by subnormalpressure in said discharge conduit, to hold said throttle in the engineidling position, operative by normal pressure in said discharge conduitto hold said throttle in the full open position, and operativebysupernorrnal pressure in said discharge conduit to move said controllever to the disconnectingpcsition.

5. In a device for pumping fuel from a con- .tainer into a tank;thecombination of an internal'combustion engine, a carburetor andath'rottle for said engine, a-pump, "a suction pipeand a dischargeconduit'for said pump, a carburetor supply pipe connecting thedischarge'conduit to the carburetor, a suction shutoff valve at th'efree end of said suction pipe, means adapted to close said suctionshutoff valve when said means encounters water, a vent valve in saidsuction pipe intermediate the suction shutoff valve and the pump,adapted for inflow of air into said suctionpipe when'said suctionshutoff valve is closed, adischarge nozzle on the free end of saiddischarge conduit, a discharge shutoff valve in said nozzle, a float forclosing said discharge shutoff valve when the'fuel in said tank reachesa predetermined level, power transmitting means for drivably connectingor disconnecting the pump to the engine, a control lever'actuable to adisconnecting or a connecting position to place said power transmittingmeans in the disconnected or the connectedsta'te, and a pressureresponsive controlmechanism associated with said discharge conduitoperative bysubnormal pressure in said discharge conduit, to hold saidthrottle in the'engine idling position, operative by normal pressure insaid discharge conduit to hold said throttle in the full open position,and operative by supernormal pressure in said discharge conduit to movesaid control lever to the disconnecting position.

6. In a device for pumping fuel from a container into a tank, thecombination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a suction shutoff valve at the free end of saidsuction pipe, a float adapted to rise and close said suction shutoffvalve when said float is emersed in water, a vent valve in said suctionpipe intermediate the suction shutoff valve and the pump, adapted forinflow of air into said suction pipe whe said suction shutoff valve isclosed, a discharge nozzle on the free end of said discharge conduit, adischarge shutoff valve mechanism in said nozzle, adapted to close whenthe fuel in said tank reaches a predetermined level, power transmittingmeans for drivably connecting or disconnecting the pump to the engine, acontrol lever actuable to a disconnecting or a connecting position to,place said power transmitting means in thedisconnected or the connectedstate, and a pressure responsive control mechanism associated with saiddischarge conduit operativc by sub-normal pressure i said dischargeconduit, to hold said throttle in the engine idling position, operativeby' normal pressure in said discharge conduit to hold said throttle inthe full open position, and operative by supernormal pressure insaiddischarge conduit to move said control lever to the disconnectingposition.

7.' In a device for pumping fuel from a container into a tank, thecombination of an interrial combustion engine, carburetor and a throttlefor said engine,a'pump, a suction pipe and a discharge'conduit for'saidpump, a carburetor supcharge nozzle o'n thefree end of said dischargeconduit, a discharge shutofl valve mechanism in said nozzle, adapted toclose when the fuel in said tank reaches a predetermined level, powertransmitting means for drivably connecting or disconnecting the pump tothe engine, a control lever actuable to a disconnecting or a connectingposition to place said power transmitting means in the disconnected orthe connected state, and a pressure responsive control mechanismassociated with said discharge conduit operative by subnormal pressurein'said discharge conduit, to hold said throttle in the engine idlingposition, operative by normal pressure in said discharge conduit to holdsaid throttle in the full open position, and

operative by supernormal pressure in said dis-' charge conduit to movesaid control lever to the disconnecting position.

8. In a device for pumping fuel from a container into a tank, thecombination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitior said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a suction shutoff valve at the free end of saidsuction pipe, means adapted to close said suction shutoff valve whensaid means encounters water, a vent valve in said suction pipeintermediate the suction shutoff valveand the pump, adapted forinfiow ofair into said suction pipe when said suction shutoii valve is closed, adischarge nozzle on the free end of said discharge conduit, a dischargeshutoff valve mechanism in said nozzle, adapted to close when the fuelin said tank reaches'a predetermined level, power transmitting means fordrivably connecting or disconnecting the pump to the engine, .a controlmeans operable manually to place said power transmitting means in theconnected state, and a pressure responsive control mechanism associatedwith said discharge conduit operative by subnormal pressure in saiddischarge conduit, to hold said throttle in the engine idling position,operative by normal pressure in said discharge conduit to hold saidthrottle in the full open position, and operaive by supernormal pressurein said discharge conduit to move said manually operated control meanstothe disconnecting position.

9. In a device for pumping fuel from a container into a receptacle, thecombination of an internal combustion engine, a'carburetor and 'athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a suction shutofi valve at the free end of said suctionpipe, means adapted to close said suction shutoff valve when said meansencounters water, a vent valve in said suction pipe, intermediate thesuction shutcii valve and the pump, adapted for inflow of air into saidsuction pipe when said suction shutofi' valve is closed, a dischargenozzle of the .free end of said discharge conduit, a discharge shutoffvalve mechanism in said nozzle, adapted to close when the fuel in saidreceptacle reaches a predetermined level, power transmitting means fordrivably connecting or disconnecting the pump to the engine, a controlmeans operable manually to place said power transmitting means in theconnected state, and a pressure responsive control mechanism associatedwith said discharge conduit operative by subnormal pressure in saiddischarge conduit, to hold said throttle in the engine idling position,operative by normal pressure in said discharge conduit to hold saidthrottle in the full open position, and operative by supernormalpressure in said discharge conduit to move 10. In a device for pumpingfuel from a container, the combination of an internal combustion'engine, a carburetor and a throttle for said engine, a pump, asuction pipe and a discharge conduit for said pump, .a carburetor supplypipe connecting the discharge conduit to the carburetor, a suctionshutofi valve at the free end of said suction pipe, means adapted toclose said suction shutofi valve when said means encounters Water, avent valve in, said suction pipe intermediate the suction shutoff valveand the pump, adapted for inflow of air into said suction pipe when saidsuction shutoff valve is closed, power transmitting means for drivablyconnecting or disconnecting the pump to the engine, a control meansoperable manually to place said power transmitting means in theconnected state, and a pressure responsive control mechanism associatedwith said discharge conduit operative by subnormal pressure in saiddischarge conduit, to hold said throttle in the engine idling position,and operative by normal pumping pressure in said discharge conduit tohold said throttle in the full open position.

11. In a device for pumping fuel from a container, the combination of aninternal combustion engine, a throttle for said engine, a pump, asuction pipe and a discharge conduit for said pump, a suction shutoffvalve at the free end of said suction pipe, means adapted to close saidsuction shutoff valve when said means encounters water, a vent valve insaid suction pipe intermediatee the suction shutoff valve and the pump,adapted for inflow of air into said suction pipe when said suctionshutoff valve is closed, means drivably connecting the engine and pump,and a pressure responsive control mechanism associated with saiddischarge conduit operative, when the pressure in said discharge conduitis less than the normal pumping pressure, to hold said throttle in theengine idling position, and operative by normal pumping pressure in saiddischarge conduit to hold said throttle in the full open position.

12. In a device for pumping liquid from a container into a receptacle,the combination of an internal combustion engine, a carburetor and athrottle for said engine, a pump, a suction pipe and a discharge conduitfor said pump, a carburetor supply pipe connecting the discharge conduitto the carburetor, a discharge nozzle on the free end of said dischargeconduit, a discharge shutoff valve mechanism in said nozzle, adapted toclose when the fuel in said receptacle reaches a predetermined level,power transmitting means for drivably connecting or disconnecting thepump to the engine, a control means operable manually to place saidpower transmitting means in the connected state, and a pressureresponsive control mechanism associated with said discharge conduitoperative, when the pressure in said discharge conduit is less than thenormal pumping pressure, to hold said throttle in the engine idlingposition, operative by normal pumping pressure in said discharge conduitto hold said throttle in the full open position, and operative bysupernormal pressure in said discharge conduit to move said manuallyoperated control means to the disconnecting position.

13. In a device for pumping liquid from a, container, the combination ofan internal combustion engine, a throttle for said engine, a pump, drivemeans connecting the engine and pump, a

side drains: backwardly through the pumpwhen said' pump-is not driven, apressure. responsive means. associated with the discharge side of saidpump operative by supernormal pressure in said discharge side todrivably disconnect said pump from said engine, a carburetor for saidengine having a small reserve reservoir capable of oper.-; ating saidengine a. limited time after its source of supply is interrupted, andconduit means for.

maintaining said reservoir filled from said dise. charge side While saidpump is operating.

DAVID SAMIRAM;

